System, clamping element and counter-element for the connector of profiled elements

ABSTRACT

System for connecting profile elements includes a separate clamping element having a clamping plate and at least one protrusion and a separate locking element having a base plate and at least one protrusion. In an assembled state, the locking element butts against that side of the profile elements located opposite the clamping element, such that protrusions of the locking element and of the clamping element are directed toward one another. A device is utilizes to clamp the clamping element and the locking element together such that, in the assembled state, the profile elements are clamped in between the clamping element and the locking element. The device being guided centrally between the profile elements.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a system, a clamping element and a lockingelement for connecting profile elements. The system and the clamping orlocking elements are suitable, in particular, for the universalfastening of structural parts, in particular of profiles and panels onprofile elements and/or for connecting profile elements to one another,to fixed objects or to add-on parts.

2. Background Description

In order to erect racks, wall claddings, storage means, fair stands orthe like which can be adjusted in a variety of ways, can be subjected tohigh loading and can be assembled and dismantled as desired, use hasusually been made up until now of profiles which have periodicallyrepeating recesses such as holes or notches. The smaller the spacingsbetween these recesses, the more precisely can the elements fitted onthe profiles be adjusted. Racks of small to medium size usually havefour profiles which are used as uprights and into which shelves arescrewed. Racks with side walls which are designed in one piece are knownas an alternative to this.

The disadvantage of all the known designs is the need for producing therecesses in the profiles or uprights, use being made of customaryproduction methods such as punching, drilling or milling. A high levelof variability requires small unit spacings, which involve increasedoutlay if they are to be produced in relatively thick profile. Ingeneral, such load-bearing structures with periodically repeatingrecesses cannot be adjusted with the desired precision.

SUMMARY OF THE INVENTION

Taking this prior art as the departure point, the object of theinvention is to provide a system, a clamping element and a lockingelement for connecting profile elements by means of which maximum levelsof adjustability and specific load-bearing capacity and low outlayduring the production and assembly of, as far as possible, commerciallyavailable profiles is possible.

This object is achieved according to the invention by a system havingthe features of claim 1, a clamping element having the features of claim17 and a locking element having the features of claim 26. Advantageousconfigurations and developments of the invention are given in thesubclaims.

The system for connecting profile elements has a clamping element whichcomprises a clamping plate and at least one protrusion which is orientedat least essentially at right angles to the clamping plate and serves asa stop or abutment for profile elements. This clamping element connectsboth add-on parts to profile elements and the profile elements to oneanother. This makes it possible for separate rods to be accommodated bythe clamping elements such that they are secured in position in relationto one another. Also provided is a locking element with a base plate andat least one protrusion perpendicular to the base plate as a stop for aprofile element, it being the case that, in the assembled state, thelocking element butts against that side of the profile element which islocated opposite the clamping element, such that the protrusions of thelocking element and of the clamping element are directed toward oneanother.

In the assembled state, the protrusions engage around the profileelement or the profile elements or butt against the same. Formed on theclamping plate and on the locking element are devices for bracing thesame in the direction of one another, the profile elements beingsubjected to a permanent pressing force of the locking element and ofthe clamping plate, with the result that, in the assembled state, theprofile elements are clamped in between the clamping element and thelocking element and at least one side of the profile element buttsagainst a wall of the protrusions which is located perpendicularly tothe clamping element and the locking element. The devices for bracingpurposes are guided through essentially centrally between the profileelements, with the result that central force introduction takes place;as a result of the devices being guided through between two profileelements, the latter remain intact, so there is no need for anyadditional machining, such as drilling, of the profile elements. Loosefastening or positioning of the clamping element and of the lockingelement allows for length compensation and displaceability of theelements in relation to one another.

In order to avoid tilting in particular of multi-part profile elements,provision is made for the devices for exerting the necessary tensilestress and/or for bracing purposes to be arranged essentially along thecenter axis of the protrusions or, in the case of two or moreprotrusions, between the protrusions or in a mirror-symmetrical mannerin relation to the center axis of the clamping plate. The protrusionsmay be formed by recesses in a base part fastened on the clamping plateor the base plate of the clamping or locking element, for example bymilling out the profile elements of corresponding grooves or the like.

The clamping element is advantageously designed in one piece and caneasily be produced by forging or drop-forging or by a primary formingmethod. Such a primary forming method, for example precision casting,also makes it possible to cast complicated geometrical structures and toprepare threads, so that only a low level of outlay is required forsubsequent machining. It is also possible for production to take placeby cutting machining using drills and milling cutters or by some othercutting methods, e.g. using lasers or the like.

As an alternative to this, the clamping plate and the protrusions or thebase part are designed as separate parts, the advantage here residing instraightforward production. It is possible for the protrusion andclamping plate to be produced as straightforward punched parts and thento be connected to one another or fastened on one another. Thisconnecting operation can take place subsequently by straightforwardscrew connection or by the two parts being welded, placed in positionone inside the other, plugged in or adhesively bonded, depending on theuse purpose of the clamping element.

In order to realize a connection between the clamping element andlocking element which is as inexpensive and durable as possible, thedevices for bracing purposes are designed as tie rods, threads, clips,wedge leadthroughs, hooks, nut mounts, recesses, eccentric clamps orundercuts. In this way, it is possible to produce a durable andreleaseable connection by screw connection or the introduction of staybolts, toggles, wedges or the like without expensive special fabricationmethods having to be utilized. In addition to a bore or a thread, theintroduction location for the required tensile stress may also bedesigned as a slot or as a stay bolt or plate. It is possible for thetie rods or stay bolts to be integrally formed on, or designed in onepiece with, the clamping plate or the locking element.

The areas in which the system can be used are extended if cablebushings, coatings, profile recesses or protective elements are arrangedon the clamping plate, on the profile side or remote from the profile.Cables can thus be laid in an unobtrusive and reliable manner, and theprofiles are protected by the coatings or protective elements and/or thecoating provides insulation or makes it easier for the clamping plate tobe retained on the add-on part. Corresponding profile recesses allowtransverse, diagonal or longitudinal strut arrangements or furtherfastening elements to be hooked or introduced into the clamping element.

Provided on the clamping plate, in a development of the invention, aremounts, in particular transverse grooves, for components for bracing orstiffening purposes, in particular in the direction transverse to theorientation of the profile elements. Such mounts may also be formed onthe protrusions. Bores, sleeves, threads, bolts, pins, milled reliefs orundercuts are likewise arranged on the clamping plate, the arrangementof bolts or pins having the advantage that these can serve as hinges. Inparticular in the case of fair constructions, it is thus possible toproduce any desired forms with display walls and alterable partitions.

In order to fasten the clamping element securely even in the case ofsmooth and hard profile elements, it is provided that the clamping plateor the base part is, or may be, provided with at least one cutting edge,preferably between two protrusions, which cuts into the profile andproduces a form-fitting connection. This results in an indent beingproduced in the profile element during assembly and the application of acorresponding tensile force, said indent ensuring additional hold forthe clamping element and/or the add-on part fastened to the clampingelement.

In order for it to be possible for add-on parts to be easily arranged,and securely clamped, on the profile element, a clearance foraccommodating these add-on parts is formed, in a development, betweenthe clamping plate and the profile element, this clearance beingdimensioned either such that, in the assembled state, the add-on partcan be fitted and/or plugged in or such that a clamping action occursbetween the add-on part and the profile element. It is thus possible,for example, either just to plug in an angled profile, in order to resta panel thereon, or else a corresponding angled formation is initiallyintroduced between the clamping plate and profile element and, by virtueof the tensile forces being applied via the devices described above,this structural element is clamped to the profile element or profileelements. The devices for bracing purposes here are expediently arrangedin a displaceable manner, for example in a slot, on the far side of aclearance-forming shoulder in order for it to be possible, by way ofdifferent levers, to bring about appropriate force introduction. Theprotrusions here are arranged, or integrally formed, on the shoulder.

An increase in the clamping action and compensation of the surfacepressure is achieved if the clamping plate is designed to be inclined orcurved in the direction of the protrusion, particularly gentle anduniform clamping being achieved when the clamping plate is designed tobe resilient in the direction of the profile element. A furtheradvantage consists in that round material, which can be fastened by thecurvature, is forced downward in the direction of the protrusion, thisensuring secure fastening essentially irrespective of the diameter ofthe round material since the possibility of sliding upward is prevented.By virtue of the curvature, an abutment is integrated in the clampingplate.

In order to ensure, as far as possible, optimum guidance of the profileelement, it is possible for the protrusions or the protrusions and thebracing devices or the recesses in the base part to enclose the profileelement or elements on three sides. In particular in the case ofpanel-like profile elements, this configuration prevents tilting of theprofile elements in relation to one another and in respect of theprofile element, as a result of which the stability of the system isadditionally increased.

In order further to increase the reliability, in particular in the caseof systems which are set up in the vicinity of walls or ceilings, it isprovided that the locking element has bores or recesses for fastening ona wall. The locking element may thus be screwed to, or hooked into, thewall or ceiling or the floor, this making it possible to achieveincreased reliability and stability of the system as a whole.

A development provides for protrusions for enclosing the profileelement, ribbing or retention devices to be formed on the lockingelement, these ensuring, in conjunction with the recess or recesses inthe clamping element, that the profile elements or element are/issecured. The ribbing or retention devices is/are designed in accordancewith the profile element and may constitute a negative, for example, ofstructuring of the profile element. It is also possible to providemounts, in particular transverse screws, for components for bracing orfastening purposes, in particular in the direction transverse to theorientation of the profile elements. Bores, sleeves, threads, bolts,pins, milled reliefs or undercuts are likewise arranged on the lockingelement, the arrangement of bolts or pins having the advantage thatthese can serve as hinges. It is thus possible for strut arrangementsand components or structural parts optionally also to be arranged on therear side or on both sides.

A development of the invention provides that a clamping element, as hasbeen described above, is formed on the locking element on the rear sideor at an angle to the base plate. This makes it possible to achieve thesituation where any desired number of profile elements can be arrangedone behind the other or one beside the other, so that relatively longconstructions, racks, uprights, etc. can be assembled and erected.Connecting a locking element and clamping element to form one component,be this by the two being designed in one piece or being screw-connected,welded, adhesively bonded or the like, produces a connecting part orcoupling part, a so-called “assembly joint”, which opens up a largenumber of design possibilities. It is thus possible for rectilinearstructural elements, with the use of different coupling parts, torealize polygons with different angles, depending on how the couplingparts are designed. If the “rear sides” of a locking element and aclamping element are directed toward one another, this achieves analigned extension, while using angled positioning achieves a non-linearconfiguration.

The profile elements may be designed as separate tubes, bars, rails orpanel-like structural elements or else also as U-shaped, I-shaped,H-shaped, L-shaped or M-shaped profiles. Designing the profile elementsseparately results in increased flexibility and variability, whereasdesigning various preformed profiles increases the stability.

The clamping element is designed for connecting profile elements to oneanother, to fixed objects or to add-on parts. It comprises a clampingplate and at least one protrusion perpendicular to the clamping plate asa stop for a profile element, the protrusion being designed such that atleast one side of the profile element can be positioned against a wallof the protrusion which is located perpendicularly to the clampingplate. Furthermore, devices for bracing with the profile elements areprovided on the clamping element, it being the case that the devices arearranged essentially centrally or in a mirror-symmetrical manner inrelation to a center axis of the clamping plate.

The advantage with this clamping element is that, in particular in thecase of profile elements mounted on the wall or fastened on a fixedobject, corresponding add-on parts can be attached in a straightforward,quick and variable manner.

Arranged on the protrusions are mounts for bracing or stiffeningelements, in particular in the direction transverse to the orientationof the profile elements, bores, threads, bolts, pins, milled reliefs,fastening devices or undercuts, in order to achieve a maximum level ofvariability. It is also possible for the clamping element to be designedin a number of parts, the components being designed such that they canbe displaced or rotated in relation to one another, in order to allowrotation of the profile elements or to facilitate angled assembly.

It is also possible for the protrusions themselves to be designed in anumber of parts, in particular in a number of layers, the layers beingarranged axially one behind the other in the bracing direction.

The protrusions and the devices for bracing purposes are preferablyarranged on the clamping element such that the profile elements can bearranged between two protrusions, between one protrusion and one deviceor between two devices.

A locking element is preferably designed to correspond to the clampingelement, so that what has been said in relation to the clamping elementapplies correspondingly.

The invention is explained in more detail hereinbelow with reference toexemplary embodiments. The same structural elements have the samedesignations in different figures. For reasons of clarity, not all thedesignations are given in all the figures. In the figures:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a detail of an assembled system;

FIG. 1 a shows a view, in detail form, of a supporting foot; FIG. 1 bshows a locking element;

FIG. 2 shows a system mounted on a wall;

FIGS. 2 a,b,c,d show locking elements illustrated on their own;

FIG. 3 shows a partial illustration of a variant of the system used as afence;

FIG. 4 shows the system used as a storage means;

FIG. 5 shows a clamping element for accommodating round objects;

FIG. 6 shows an example of the clamping element used as a claddingfastening;

FIGS. 7 a-7 f show clamping elements illustrated on their own;

FIGS. 8 a-8 e show clamping elements illustrated on their own;

FIG. 9 shows a clamping element with a curved clamping plate;

FIGS. 10 and 11 show locking elements illustrated on their own;

FIG. 12 shows a variant of a clamping element;

FIG. 13 shows a variant of a locking element;

FIG. 14 shows a clamping element with a sub-element variant;

FIG. 15 shows a clamping element constructed in a number of layers;

FIG. 16 shows a locking element for different profile units and possibleattachment means;

FIG. 17 shows a detail of a variant of a basic part;

FIG. 18 shows a clamping element with associated functional elements inthe partially assembled state;

FIG. 19 shows illustrations solely of functional elements as lockingelements;

FIG. 20 shows a locking element constructed in a number of parts;

FIG. 21 shows a locking element constructed in a number of layers, withadd-on parts placed in position; and

FIG. 22 shows a single-piece clamping element with differently orientedprotrusions.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

FIG. 1 shows a system for connecting profile elements 2 via a clampingelement 1, which interacts with a locking element 3 via devices forbracing the clamping element 1 with the locking element 3. The detail ofa table or of a trestle which is illustrated here shows two profileelements 2 a which are designed as panels or rails with a rectangularcross section. These profile elements 2 a are arranged separately andextend vertically in the longitudinal direction in order to form acorresponding upright or a table leg or support.

Arranged at the bottom end of the profile elements 2 a is a foot 40,which is illustrated in detail in FIG. 1 a. The two profile elements 2 aare oriented parallel to one another and are partially enclosed on theirnarrow sides by the clamping element 1, more precisely by theprotrusions 11 which project from a base part 10 arranged on theclamping plate 20. Arranged on the other side of the profile elements 2a is a locking element 3, of which the protrusions 11 likewise enclosesthe profile elements 2 a and thus fixes the latter in position inrelation to one another.

The clamping element 1 and the locking element 3 are braced in relationto one another via a screw 22, the foot 40 likewise being clamped in. Byvirtue of the screws 22, the profile elements 2 a, the foot 40 and theclamping element 1 and the locking element 3 are braced in relation toone another. In addition to the profile elements 2 a being reliablypositioned in relation to one another, the add-on part, in the form of afoot 40, is thus also fixed in a vertically adjustable manner.

A clamping element 1 is likewise arranged at the top end of the twovertical profile elements 2 a, and the construction of this clampingelement will be described in detail at a later stage of the text.Parallel to the longitudinal sides of the profile elements 2 a, furtherprofile elements 2 b extend at right angles thereto, these furtherprofile elements having a U-shaped cross section and the openings of theUs being oriented in opposite directions. Openings are produced in theconnection between the two legs of the U-shaped profile 2 b, and aprotrusion of the locking element 3 engages in these openings, as aresult of which this locking element is connected in a form-fittingmanner to the profile elements 2 b. Likewise via a screw 22, theclamping element 1 is then braced with the locking element arrangedbetween the profile elements 2 b, with the result that the horizontallyoriented profile elements 2 b are connected to the vertical profileelements 2 a, this producing an angle on which, for example, a table topor the like can be set down.

It is also the case on the top clamping element 1, via bracing of thetop clamping element 1 with the correspondingly arranged locking element3, which has, for example, a thread in which the screw 22 can engage,that a connection or strut arrangement 41 is secured as a support on thevertically oriented profile elements 2 a. As a result of thestraightforward construction of the profile elements 2 a, 2 b and thecommercially available elements 4 bracing the clamping elements 1 withthe locking elements 3, quick construction and dismantling, adjustmentand adaptation and also cost-effective production of the system and ofthe components or structural parts is possible.

FIG. 1 b shows the locking element 3 which is used in FIG. 1, and hastwo tie rods projecting through it, it being possible for thecorresponding forces to be introduced at these tie rods via nuts. Onetie rod here can serve for mounting in a wall or some other structuralpart and, at the same time, acts as a spacer in relation to the wall orthe structural part, while the other tie rod serves for applying theclamping forces between the clamping element 1 and the locking element3.

FIG. 2 illustrates a similar system, in the case of which the lockingelement 3 is fastened on a wall and has a thread 31, as is illustratedin FIG. 2 b or 2 d, in which the screw 22 can engage for bracing theclamping element 1 with the locking element 3. The profile elements 2,designed as metal strips here, are secured against buckling laterally byprotrusions 11 in the clamping element 1 and the locking element 3.Fastening the locking element 3 on the wall increases the stability, forexample, of a rack structure or makes it possible to configure thelatter with two uprights and merely to provide load-bearing arms, whichare arranged on the system.

Whereas in FIG. 2 the locking element 3, with bores 35 arranged on thecentral crosspiece, can be fastened on the wall, for example a sidewall, a ceiling or a floor, in FIG. 2 d the bores 35 are produced inrecesses of the locking element 3, with the result that the respectivefastening means, preferably screws, secure the locking element 3 in arecessed state. The device for bracing with the clamping element 1 isdesigned in FIG. 2 d as a bore which is provided with a thread 31 and islocated along a center axis M, in FIG. 2 c as a tie rod 32, and in FIG.2 b likewise as a threaded bore 31 arranged centrally between twoprofile elements, the locking element 3 in FIG. 2 b not having anyseparate bores for wall-fastening purposes. The locking element 3illustrated forms something of a universal locking element which, ifrequired, is provided with appropriate fastening means, for example witha slot for a screw head. It is possible here for the locking element 3to be connected to the wall in some other way, for example welded, orpossibly adhesively bonded, for example to a metal wall. The recessesand protrusions 11 in the locking element 3 each serve for guiding theseparate profile elements 2 and may analogously be designed as recessesin the base part 10 for forming protrusions 11. FIG. 2 a shows a variantin which an undercut is produced in the locking element 3, it beingpossible for a corresponding bracing element to be introduced into saidundercut.

FIG. 3 shows an alternative construction of the system in a use exampleas a fence, in the case of which, once again, two separate profileelements 2 are arranged vertically and form an upright. The clampingelement 1 illustrated in this exemplary embodiment interacts with thelocking element 3 by the same principle as has been described withreference to FIG. 1 or 2, although in this case the clamping plate 20contains a slot 50 into which the screw 22, which subjects the lockingelement 3 to the tensile forces, can be introduced. It is thus possiblefor the screw 22, in the first instance, to be preassembled on thelocking element 3 and for the clamping element 1 to be pushed in via theslot 50 and moved to the desired position before the screw 22 istightened, in order to brace the profile elements 2, the locking element3 and the clamping element 1 in relation to one another.

FIG. 3 clearly shows a protrusion 11 on the locking element 3, by meansof which the profile element 2 is prevented from yielding laterally. Itcan likewise be seen here that an add-on part in the form of a support41 is inserted in a clearance, on the part of the locking element, forthis purpose. Depending on the configuration of the clearance, thesupport 41, designed as a covering angle, is either plugged in looselyor secured on the profile element or elements 2. Furthermore, mounts 24for round bodies such as cables, tubes, wires, bars or stiffeningelements are provided on the clamping element 1, these mounts, in thepresent case, being designed as bores.

It is likewise possible for the stiffening elements 25 or fence posts tobe inserted such that they are secured on the profile elements 2 by theclamping element. In order for it to be possible to ensure reliablepositioning, while maintaining a wide range of possible variations, itis possible, in an advantageous configuration, to provide, in thecontact regions, a polygonal profiles or corresponding undercuts, bymeans of which the stiffening elements are fixed in addition to theclamping on the profile elements 2 and the clamping element 1. Inparticular in order for it to be possible for doors or walls to befitted easily, a bolt 23, which acts as a hinge, is provided on theclamping element 1. This makes it possible, in particular in the case offair construction, to produce a variety of forms and variable structureswithout major structural measures having to be taken, in particular itis possible for walls to be pivoted or door structures to be realizedvia door hooks. In addition to the bolt 23 being formed integrally onthe clamping element 1, provision is made for this bolt to besubsequently screwed in or fastened on the clamping element 1 in someother way.

FIG. 4 shows an example of a rack structure in the case of whichsupports 41 can be fastened on the profile elements 2 at any height,even in a state in which they are tilted through 90°, via the clampingelement 1 and the locking element 3. The supports 41 form the base forpanels or grates, on which the respective articles can be set down. Onaccount of the clamping principle, it is possible for the heights to beadjusted as desired and in a stepless manner. Simply by virtue ofreleasing and tightening the screw 22, it is possible for adjustment tobe carried out without the shelves being removed. The variousconfigurations of the supports 41 make it possible to use carriers asend supports or as bearing means which run beneath the panels, or tofasten the shelves in various orientations on the upright. In thepresent exemplary embodiment, the supports 41 are designed as angledprofiles, although alternative configurations are possible. The angledprofile, however, has the advantage that the shelves are provided withreliable support against bending. Round profiles or strip-like supports41 are conceivable as an alternative.

In FIG. 5, the profile elements 2 are designed as round bodies and thecorresponding protrusions 11 in the clamping element 1 are likewiserounded. The rounding which is formed by the protrusions 11 here islarge enough to ensure sufficient lateral fixing, with the result thatthe clamping forces to apply are kept within justifiable limits. In thepresent case, the clamping plate 20 is designed for connecting profilestructures which are isolated from one another. Recesses are produced inthe central crosspiece of the clamping plate 20, and the undercuts ofthese recesses correspond with head shapes at the ends of the roundelements which are to be clamped in. A form fit prevents the clamped-inprofiles from slipping out laterally or coming into contact with oneanother.

If the clamping plates 20 and the locking elements 3 are produced frominsulating material, or are covered with such a material, connection toelectrically conductive materials is possible. Current-carrying systemsfor example for low-voltage luminaires may thus be formed. The bore 21shown here serves for accommodating a screw or a tie rod for bracingwith the locking element 3 and is arranged along the center axis Mbetween two profile elements 2.

A mount 24 is also produced, preferably milled in, it being possible fora metal as conductor and/or stiffening 25 to be introduced therein. Thecentral crosspiece of the clamping plate has milled into it anappropriate profile via which forces can be absorbed in a form-fittingmanner, with the result that a good stiffening action is achieved andslipping out is prevented. Likewise produced in the central crosspieceof the clamping plate 20 is a bore 21 or a thread, via which the lockingelement 3 (not illustrated) can be subjected to the correspondingtensile forces. Here too, the advantage resides in the easy availabilityof the profile elements 2, which can be used as uprights, and in theuniversal usability and the capability for stepless adjustment alongwith a simultaneously high specific load-bearing capacity.

As an alternative to the embodiments which have been described up untilnow, FIG. 6 illustrates an exemplary embodiment in the case of which theprofile element 2 is fastened directly on the wall, or ceiling or floor,via the screw 22 and the clamping element 1. The abutment, analogous tothe locking element 3, is thus formed by the wall and serves forabsorbing the tensile forces via which the clamping element 1 is securedon the profile element 2, which in FIG. 6 is designed as a U-shapedprofile. The screw 22, which engages for example in a plug inserted intothe wall, fastens the profile element 2, the clamping element 1 and awall cladding 42 on the wall, which is advantageous, for example forsetting up display boards or for fastening facade panels, screens, pinboards or tool holders or the like.

FIGS. 7 a-7 f each show configurations of clamping elements 1 which areadapted to the respective use purpose. FIG. 7 a shows a clamping element1 with a base part 10 and the clamping plate 20, which is designedperpendicularly to the base part and in which is formed a slot 50 forthe introduction of a tie rod or a screw. The recesses produced in thebase part 10 form protrusions 11, which in this case are of round designand serve for accommodating correspondingly shaped profile elements 2.The recesses did not extend right up to the clamping plate 20, thisresulting, in the assembled state, in a clearance in which acorresponding add-on part can be positioned or clamped.

FIG. 7 b illustrates a clamping element 1 corresponding to FIG. 7 a,although the clamping plate 20 has a milled relief for a round-materialor cable bushing 27. In this way, on the one hand, add-on parts can beclamped firmly to the corresponding profile elements 2 and, at the sametime, any cables which are necessary can be guided in a satisfactorymanner.

A corresponding round-material or cable guide 27 is also shown in FIG. 7c, this, in a manner similar to FIG. 7 a, being designed for roundprofile elements 2 but, instead of a slot 50, having a threaded bore 21as the device for bracing with the locking element 3 (not illustrated)along the center axis M. As an alternative to the milled reliefaccording to FIG. 7 b, the cable guide 27 is designed as a formation ina protective element 26 which projects from the clamping plate 20 in thedirection of the profile element 2. This protective element 26 may beproduced from plastic in order to avoid impressions on, and damage to,the surface of the profile elements 2.

FIG. 7 d clearly shows the task of the protrusions 11 as recesses in thebase part or base parts 10. In this case, the clamping plate 20 extendsbetween the two parallel base parts 10, which have congruent recessesand protrusions 11 in each case. By virtue of the recesses, which aredesigned as slots and into which the corresponding sections of theprofile elements 2 for example panels or U-shaped profiles, areintroduced, a first position-fixing step is carried out, and lateralyielding of the profile elements 2 is prevented by the resultingprotrusions 11.

FIGS. 7 e and 7 f show clamping elements 1 with threaded bores 21 whichare arranged along the center axis M of the clamping element 1 and areintended for exerting the clamping forces. The threaded bores 21 arearranged centrally in relation to the protrusions 11, so that there areno tilting moments in respect of the profile elements 2. In addition, onboth sides of the threaded bores 21, additional fixing holes areprovided with threads, into which add-on parts or holders can bescrewed. Whereas a clamping element 1 according to the configuration ofFIG. 7 e still has a crosspiece or base part 10 on the clamping plate20, this crosspiece or base part providing the spacing on the clampingplate 20 from the profile elements 2, the protrusions 11 in FIG. 7 fbegin directly on the clamping plate 20, as a result of which the latterbutts directly against the profile elements 2 in the assembled state.The crosspiece in FIG. 7 e acts as an abutment for clamping purposes, asa result of which the clamped-in components or structural parts aresecurely fixed.

FIGS. 8 a-8 e show further configurations of the clamping elements 1,and in FIG. 8 a, in addition to the corresponding devices for exertingthe tensile forces on the clamping plate 20, such a device 13 is alsoprovided on the base part. This device comprises a protrusion 11 inwhich is produced a recess 13, into which, for example, a wedge can beintroduced. This produces a straightforward wedge connection between theprofile elements 2 which are positioned between the protrusions 11, andthe locking element 3, which has a corresponding recess for thethrough-passage of the tongue 13. In addition, bores 28 are provided inthe clamping plate 20, in order to fit add-on parts or to lead through,or clamp in, corresponding cables or components or structural parts, forexample diagonal strut arrangements.

FIG. 8 b shows a variant of the clamping element 1 in the case of whichtwo lateral protrusions 11 are provided, which is possible, for example,with box profiles as profile element 2 or correspondingly stableU-shaped profiles. Instead of the curved configuration in FIG. 8 a or 8d, a protective element 26 is fastened on the clamping plate 20 in orderto protect the profile elements 2, or the clamped-in components or itsstructural parts, against pressure marks. Uniform pressure distributionis likewise achieved as a result. The slot 50 for accommodating thescrew 22 or a corresponding tie rod 32 is arranged centrally in relationto the protrusions 11, in order to achieve uniform bracing of theclamping element 1 and locking element 3 with the profile element 2.

FIG. 8 c shows a variant of FIG. 8 c, albeit with three protrusions 11,which have a coating 29 produced between them, so that it is also thecase at this contact location that the profile element 2 is not damagedin any way or insulation is provided.

FIG. 8 d illustrates a variant of FIG. 8 a in the case of which thecentral protrusion 11 does not have a recess for forming a wedgeconnection. The extended, central protrusion 11 serves for increasingthe stability in fixing the separate profile elements 2 orfastening/supports of components or structural parts. Here too, theclamping plate 20 is of curved design, as a result of which theresilient abutment and uniform surface pressure against the profileelements 2 can be achieved or round material can be clampedstraightforwardly.

In FIG. 8 e, a round-material or cable bushing 27 is produced in theclamping plate 20 for example by means of a deformation method such asbending or pressing.

The base part 10, furthermore, contains bores 28 into which it ispossible to introduce, for example, pins or bolts for forming a hinge.

FIG. 9 shows a clamping element 1 with protrusions 11 on the base part10, there being formed, at least between two protrusions 11, a cuttingedge 12, by means of which it is possible to improve the fastening onthe profile elements 2 (not illustrated). The clamping plate 20 isinclined in the direction of the profile element 2 and has a slot foraccommodating a screw 22, a hook or a wedge. The angle between theclamping plate 20 and the base part 10, at least in the end region ofthe clamping plate 20, is less than 90°.

FIG. 10 shows a locking element 3 which has a threaded bore 31 foraccommodating a screw in the center between two profile elements (notillustrated). A protrusion 11 serves for fixing purposes and a base part10 serves as a spacer or shoulder for offsetting the profile elements 2from the base plate 30, and also provided in the region of the base part10 is ribbing 36, which prevents lateral displacement of the profileelements 2 if the latter butts against the ribbing 36. It is likewisethe case that retention devices 37 are formed on the clamping region 39,designed at right angles to the protrusion 11, these retention devices,in the present case, likewise being configured as ribbing 37 andpreventing clamped-in structural elements from slipping. It is likewisepossible to clamp in profiles, even made of wood, which are wider thanthe locking element 3.

FIG. 11 shows a modification of the locking element 3 illustrated inFIG. 10, in the case of which, instead of the threaded bore 31, a tierod 13 is either screwed into the retaining element 3 or integrallyformed on the latter and serves as a protrusion 11. A thread 13 (notillustrated) is produced at that end of the tie rod which is directedtoward the clamping element 1, in order to realize a screw connection.Other than a thread, it is also possible to form there an undercut or arecess for the introduction of a clip or of a wedge, by means of whichthe locking element 3 is braced with the clamping element 1. FIG. 12shows a variant of the clamping element 1 with fastening bores 28arranged in the clamping plate 20 and with a base part 10 designed as ashoulder.

FIG. 13 illustrates a locking element 3 in which bores or threads 35 areproduced, as is a thread 31 for applying the necessary tensile forces.Likewise, hinges in the protrusions 11 are integrally formed on thelocking element 3, in which doors or other, pivotable structural partcan be fitted. One advantage of this configuration is that, on the onehand, the hinges secure the profile elements (not illustrated), againstyielding laterally and, on the other hand, if assembly takes place theother way round, the hinges are located on the rear side of the clampingelement 1/locking element 3 combination, this increasing the possiblevariations for constructing the system.

By virtue of the abovedescribed system or clamping element 1 and lockingelement 3, it is possible in many sectors, for example for fitting outrooms, in building technology, decoration, storage and fairconstruction, for commercially available structural parts to be set upin a free-standing manner, to be fastened to one another or else to becoupled to existing structures. It is likewise possible for barriers andrailings to be produced, for screens or banners to be fixed or for salesaids or laboratory structures to be erected or coupled to one another.For aesthetic purposes, profiles may be used in a double arrangement andparallel to one another, which increases the stability of the structureas a whole. Using straightforward means which are uncomplicated andinexpensive to produce and use, it is possible to provide virtuallyunlimited adjustability: a structure of which the parts can bedisconnected, reused and combined as desired. Metal or plastic is thematerial which is preferably used for the elements of the system or ofthe clamping element. The coatings may be designed for insulatingpurposes or as corrosion protection or as a means for improvingadherence.

FIG. 14 shows a clamping element 1 comprising a first clamping plate 20and a second plate 20′, which is arranged axially behind the firstclamping plate in the bracing direction, and also comprising, oppositethe clamping plate 20, a locking element 3. Provided both in theclamping element 1 and in the locking element 3 are devices 21, 31 forbracing the two in relation to one another, these devices being designedhere as bores or as threads. The clamping plate 20 is of circular designand has protrusions 11 projecting at right angles from it, it beingpossible for a profile element or a component or a structural partconfigured in an appropriately different manner to be positioned againstsaid protrusions. Provided above the clamping plate 20, in the secondplate 20′ is a more or less semicircular recess 27 for the introductionof cables, round material, threaded rods or the like. The round materialpositioned in the recess 27 is fixed and secured in conjunction with theprofile elements which are to be clamped in. On account of the clampingelement 1 being designed in two parts with the first clamping plate 20and second clamping plate 20′ easy capability for angular adjustment ofthe second clamping plate 20′ in relation to the first clamping plate 20and/or the profile element secured therein is realized.

Arranged on the locking element 3 are fastening devices or protrusions11 which can accommodate, for example, threads or in which profileelements can likewise be positioned, with the result that thisconfiguration of the locking element 3 allows various segments to beinterlinked. It is possible for these protrusions 11 to be designed inone piece or to be fitted subsequently; it is likewise possible forthese protrusions 11 to be arranged in a moveable manner and such thatthey can be secured on the locking element 3, in order to provide foreasy adaptability to different use purposes.

FIG. 15 shows a clamping element 1 which is constructed from threeclamping plates 20, 20′ and 20″, there being arranged on the firstclamping 20 a base part 10 which has protrusions 11 for accommodating aprofile element. Produced in the two end sides of the second clampingplate 20′ is a recess with a semicircular cross section which can serveeither as a fastening for round material or for securing cables;alternatively, in the case of appropriate alignment with a correspondingrecess in the third clamping plate 20″, it is possible, by placing acorresponding component or structural part in position, to secure theclamping plates 20′ and 20″ in relation to one another in order thus toachieve a defined angled position. Adjustment is readily possiblefollowing withdrawal of said component or structural part, this allowingform-fitting latching in another angled position in which two recessesof different clamping plates are appropriately aligned in relation toone another.

FIG. 16 illustrates a variant of the clamping element 1 which has arectangular clamping plate 20 with protrusions 11 formed at each of itsfour corners, the protrusions projecting essentially at right anglesfrom the clamping plate 20. The protrusions 11 are located opposite oneanother and, between them in each case, have a recess in which profileelement can be positioned. The rectangular format of the clamping plate20 makes it possible, by rotating the clamping element 1 through 90°, tosecure different profile widths and/or to adapt to two different profilewidths. The protrusions 11 themselves each contain a thread 210, intowhich screws or threaded rods can be screwed in order either to clampthe profiles firmly or to create possible attachment means or strutarrangements. Recesses 200 are likewise provided in the clamping plate20, in order for components or structural parts to be positioned thereor, for example, for a locking element according to FIG. 1 to bepositioned there.

FIG. 17 shows a variant of FIG. 16 in the case of which a protrusion 11is provided with a thread 210 and a bore 220 in order for it to bepossible for components or structural parts to be plugged in or fixed.

FIG. 18 shows, in the partially assembled state, two profile elements 2with a clamping element 1 which is connected, via a screw 22, to alocking element 3 (not illustrated) in order to brace and secure theprofile elements 2 in relation to one another. The clamping plate 20contains a slot 50 which is open in the upward direction and throughwhich, on the one hand, it is possible to introduce the screw 22,although this slot also serves, on the other hand, as a mount for thelaterally offset functional elements 70, 70′ and 70″ provided forassembly purposes. Here too, the clamping plate 20 contains a recess 27,in which the rotary functional parts 70, 70′ and 70″ can be positionedand braced in relation to the profile elements 2. Providing a hexagonalprotuberance makes it possible for the internally threaded or externallythreaded functional parts 70 and 70′ to be secured in a form-fittingmanner between the profile elements and within the slot 50 and to belocked, if appropriate, by a suitable wrench, if the rotary functionalpart 70, 70′ is subjected to a correspondingly high torque. Provided asan alternative to such a hexagonal protuberance is a crosspiece with aform-fitting latching element which can serve, for example, as a bearingbushing for a Venetian blind, for a roller blind or for other elementswhich are to be rotated. The rotary functional part 70″, in the same wayas the hexagonal protuberance, may result in interior stabilization ofthe profile elements 2, so that it is possible to dispense with acentral crosspiece provided in the base part. In order to reduce thesurface pressure, the functional part 70′″ is designed with aquadrilateral cross section, the recess 27 being configuredcorrespondingly.

FIG. 19 illustrates different configurations of the rotary functionalparts 70 which can be positioned in the recess 27 of the clampingelement 1 and act as a locking element, the top functional element beingprovided with an internal thread and a hexagonal protuberance with athreaded bore running at right angles to the internal thread, with theresult that bracing by means of a screw 22 can also take place directlyby way of the functional element 70. An alternative to the configurationwith an external thread provides for a threaded rod with at least oneflattened longitudinal side for position-fixing purposes, it beingpossible for recesses in the form of a slot or of a hexagon socket to beformed on the end sides in order to effect fixing and alignment withinthe recess 27 or a corresponding bore. In accordance with the use theconditions, the flattened longitudinal surface may be coated or may haveribbing, straightforward withdrawal thus being rendered more difficult.In a manner analogous to the configuration above, it is also the casehere that the functional element has a threaded bore runningperpendicularly to the external thread.

FIG. 20 shows a development of the locking element 3 which comprises aclamping plate 30 and threaded bores 32 arranged therein for bracingwith a corresponding clamping element 1. Base elements 100 are providedwithin the clamping plate 30, the present figure, for reasons ofclarity, illustrating just one base element 100. The base element 100 isarranged in a slot and comprises a screw, in this case a hexagon-socketscrew, which provides a stop for a profile element 2 (not illustrated).On the side located opposite the thread 32, either a slot 280 is, or twothreaded bores 320 are, produced in the clamping plate 30, in order fora base element 100 likewise to be screwed in and/or secured there. Aconfiguration with a slot 280 provides for a capability for steplessadjustment of the interspace 110 between the base elements 100, theadjustment outlay here being higher than for the bottom illustration, inthe case of which predetermined positions can be set on account of thethreaded bores 320 produced, these serving, at the same time, as a wallfastening.

FIG. 21 illustrates an alternative configuration of a locking element 3which is formed from different clamping plates 30, 30′, 30″, 30′″ and onaccount of the layer-like arrangement, on the one hand, can be extendedas desired and, on the other hand, can be varied in terms of the angularadjustment.

In addition, the locking element 3 of FIG. 21 shows that, by virtue ofprotrusions 11 being arranged on one side and a base element 100 beingarranged on the opposite side, on another clamping plate 30′″, it ispossible for a plurality of structural elements to be lined up onebeside the other in the bracing direction, with the result that complexrack systems or constructions such as fair stands or frameworks can beeasily realized. The intermediate layers 30′ and 30″ serve foraccommodating various components, or structural parts, or supports 41with the result that, for example, cables can be laid satisfactorilyalong a recess 27 parallel to the corresponding supports 41.

FIG. 22 shows a clamping element 1 with a vertical clamping plate 20which has a slot-like recess into which devices for bracing with alocking element (not illustrated) can be introduced. Protrusions 11 areformed on both sides of the clamping plate 20 and serve as a stop forprofile elements which are to be accommodated and/or placed in position.A base part 10 is arranged at the bottom end between the protrusions 11,which extend in the forward direction, with the result that the clampingelement 1 illustrated can serve as a foot or base for constructions orracks. Through the bores within the protrusions 11, it is possible tointroduce a multiplicity of fastening or bracing means, andcorresponding bracing or fastening of add-on parts can take place.

1. A system for connecting at least two elognated profile elementscomprising: a separate clamping element comprising a clamping plate anda base arranged essentially perpendicularly to the clamping plate, atleast one recess formed in the base such that at least one protrusionprojects from the base essentially perpendicularly to the clampingplate, the at least one protrusion acting as a stop by abutting againsta side of each profile element, the at least one protrusion preventing,in a form-fitting manner, displacement of the profile elements in adirection perpendicular to a longitudinal extent of the profile elementsand parallel to the clamping plate; a separate locking elementcomprising a base plate and at least one protrusion arranged essentiallyperpendicularly to the base plate, the at least one protrusion acting asa stop by abutting against a side of each profile element, the at leastone protrusion preventing, in a form-fitting manner, displacement of theprofile elements in the direction perpendicular to the longitudinalextent of the profile elements and parallel to the base plate; wherein,in the assembled state, the locking element butts against a side of eachof the profile elements and is located opposite the clamping element,such that the at least one protrusion of the locking element and the atleast one protrusion of the clamping element are directed toward oneanother; and a bracing arrangement that clamps, in the assembled state,the profile elements between the clamping element and the lockingelement, wherein at least one side of each of the profile elements abutagainst a wall of the at least one protrusion of the clamping elementand a wall of the at least one protrusion of the locking element,wherein the bracing arrangement comprises a bracing device that is atleast one of: arranged, and guided through, essentially centrallybetween the profile elements, and arranged, and guided along a centeraxis of the base plate or of the clamping plate; wherein the at leastone protrusion of the clamping element extends out from the base by anamount that is greater than a thickness of the clamping plate, andwherein a portion of the base extends between the at least one recessand the clamping plate such that, in the assembled state, a clearance isformed for accommodating elognated add-on structural elements betweenand contacting the profile elements and the clamping plate.
 2. Thesystem as claimed in claim 1, wherein the clamping element is a onepiece member.
 3. The system as claimed in claim 1, wherein the bracingdevice comprises one of: one or more tie rods, one or more threads, oneor more clips, one or more wedge leadthroughs, one or more hooks, one ormore nut mounts, and one or more recesses or undercuts.
 4. The system asclaimed claim 1, wherein the clamping plate is of inclined or curveddesign in relation to the at least one protrusion of the clampingelement.
 5. The system as claimed in claim 1, wherein the at least oneprotrusion of each of the clamping element and the locking element eachfurther comprises two outer protrusions which abut against the profileelements on both outer sides.
 6. The system as claimed in claim 1,wherein the profile elements comprise; separate tubes, bars, rails, aU-shaped profile, an I-shaped profile, an H-shaped profile, or anM-shaped profile.
 7. The system as claimed in claim 1, wherein theclamping element and the locking element are designed such that they canbe lined up axially one behind the other in a bracing direction.
 8. Thesystem as claimed in claim 1, wherein the clamping element is a onepiece L-shaped member and the at least one protrusion is centrallydisposed, and the at least one recess comprises two recesses arrangedbetween the at least one protrusion and two outer protrusions, each ofthe two recesses comprising a bottom wall and two parallel sidewalls. 9.A clamping element for connecting one elognated profile element toanother elognated profile element, to fixed objects or add-on structuralelements, comprising: a clamping plate and a base arranged essentiallyperpendicularly to the clamping plate, at least one recess formed in thebase such that at least one protrusion projects from the baseperpendicular to the clamping plate and acts as a stop by abuttingagainst a side of one of the profile elements, the at least oneprotrusion being designed such that at least one side of the profileelement can be positioned against a surface of the base and a wall ofthe at least one protrusion, the at least one protrusion preventing, ina form-fitting manner, displacement of the profile element in adirection perpendicular to a longitudinal extent of the profile elementand parallel to the clamping plate, wherein, a portion of the baseextends between the at least one recess and the clamping plate such thatin the assembled state, a clearance for accommodating elongated add-onstructural elements is provided between the profile element and theclamping plate; a bracing device for bracing the profile elementsbetween the clamping element and an opposing locking element is providedon the clamping element, wherein the bracing device is arranged along acenter axis of the clamping plate, wherein the at least one protrusionextends out from the base by an amount that is greater than a thicknessof the clamping plate, and wherein the at least one protrusion isconfigured such that, in the assembled state, the clearance isstructured and arranged to accommodate the add-on structural elementsbetween and in contact with the profile element and the clamping plate.10. The clamping element as claimed in claim 9, wherein the at least oneprotrusion further comprises two outer protrusions and the bracingdevice is arranged such that the profile elements can be arrangedbetween at least one of: the two outer protrusions; and one outerprotrusion and the bracing device.
 11. The clamping element as claimedin claim 9, wherein the at least one protrusion comprises protrusionsformed on opposite sides of the clamping plate.